When i took the boat out for the first time this year the batteries run flat and didnt appear to be charging by the alternator?? eventually they run flat and i had to boost the batteries?? The batteries were very low when i took it out but i thought they would get charged, even when i turned everything off inside the boat!! but they didnt????? I am taking it out again today (With full batteries) and will take an amp meter to check what the alternator is putting into the batteries??

Do you think my batteries are not 'MAN' enough to handle the extra stuff????